Seaside / Salinas, CA: Intersystems Communications, 1987. First edition. 8vo, xiv, 347pp, perfect bound in wraps designed by Heinz Von Foerster.
Important work by the radical constructivist, collecting texts by the author divided here into four parts - Language and Semantics, Constructivist Epistemology, and Concepts of Number.
Some minor wear to wraps else fine. Item #30499